-76.05% is the change from 664 to 159
Calculation steps:
[( 159 - 664 ) ÷ 664] x 100 = -76.05%
Formula
Percentage change = [(159 - 664) / 664] x 100
Subtract the new number by the original number
159 - 664 = -505
-505 ÷ 664 = -0.7605421686746988
-0.7605421686746988 x 100 = -76.05%